Mixer



FIG. 1 is a top perspective view of a mixer showing my new design;

FIG. 2 is a bottom perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a top side view thereof; and,

FIG. 8 is a bottom side view thereof.

The broken lines illustrate portions of the mixer and form no part of the claimed design. 

The ornamental design for a mixer, as shown and described. 